本文選題：激光顯示 + 熒光材料　； 參考：《山東大學(xué)》2017年碩士論文

【摘要】：激光顯示作為新一代的顯示技術(shù),其優(yōu)異的顯示性能引起了科研和生產(chǎn)領(lǐng)域極大的關(guān)注,然而因?yàn)槠浯嬖诘桶踩浴⒏叱杀疽约案缮嫔咴肼暤热秉c(diǎn),所以仍未達(dá)到全面應(yīng)用的標(biāo)準(zhǔn)。激光激發(fā)熒光粉顯示技術(shù)主要利用單色激光激發(fā)熒光色輪以產(chǎn)生其它光線并最終經(jīng)過混合得到所需光源。該技術(shù)不僅解決了激光消散斑問題,在壽命、可靠性與安全性上,繼承了傳統(tǒng)半導(dǎo)體光源的優(yōu)勢(shì),而且降低了激光光源成本。因此,該技術(shù)有望作為激光顯示的改進(jìn)技術(shù)并最終得到廣泛的應(yīng)用。當(dāng)前對(duì)于激光顯示領(lǐng)域藍(lán)光激發(fā)熒光材料的研究較為匱乏,因此,獲得在藍(lán)色激光激發(fā)下發(fā)光效率高、穩(wěn)定性好、熒光壽命較短、耐高溫的熒光材料將成為加快激光顯示發(fā)展和普及的關(guān)鍵。本文主要的工作內(nèi)容如下:1.首先針對(duì)已存在的代表性熒光粉材料進(jìn)行了一系列的表征。利用X射線光電子能譜分析儀和X射線衍射儀對(duì)其進(jìn)行了元素構(gòu)成及物相結(jié)構(gòu)方面的分析。利用掃描電子顯微鏡表征獲得熒光粉材料的微觀形貌,包括粒子尺寸、粒子均勻性等。利用光致發(fā)光光譜儀、熒光光度計(jì)等測(cè)試手段表征了熒光粉材料的光學(xué)性能,包括激發(fā)與發(fā)射光譜、量子產(chǎn)率及熒光壽命等。2.利用具備優(yōu)異光學(xué)性能的熒光粉材料通過高溫反應(yīng)得到致密化的熒光陶瓷材料,以獲得更好的光學(xué)及力學(xué)性能。本文對(duì)藍(lán)色激光激發(fā)的熒光陶瓷材料的制備工藝進(jìn)行了研究。在樣品坯體合成過程中,通過改變添加劑的種類及質(zhì)量分?jǐn)?shù),壓片方式及壓力大小等因素探究其分別對(duì)熒光陶瓷材料燒結(jié)致密化程度的影響,并分析產(chǎn)生影響的工作機(jī)制。在樣品高溫?zé)七^程中,通過改變最高保溫溫度,升降溫速率及保溫時(shí)間等因素探究其分別對(duì)熒光陶瓷材料燒結(jié)致密化程度的影響,并從微觀粒子角度,分析了熒光粉顆粒在反應(yīng)過程中的變化,解釋了燒結(jié)條件對(duì)陶瓷材料致密化甚至其光學(xué)性能產(chǎn)生影響的微觀機(jī)理。根據(jù)實(shí)驗(yàn)結(jié)果分析,得出結(jié)論:(1)為使熒光陶瓷材料達(dá)到最佳致密化程度,在原料混合過程中,根據(jù)熒光粉原料的不同,所加入添加劑的含量存在一個(gè)最佳質(zhì)量分?jǐn)?shù)。(2)在坯體壓制成型過程中,壓力大小及保壓時(shí)間均存在一個(gè)最佳值,最有利于樣品充分致密化。(3)樣品燒結(jié)過程中,相對(duì)于保溫時(shí)間的延長,提高保溫溫度對(duì)于促進(jìn)陶瓷致密化的影響更大,保溫時(shí)間的延長可能會(huì)引起晶粒的異常長大,反而降低熒光強(qiáng)度和發(fā)光效率。3.本文對(duì)合成熒光陶瓷材料進(jìn)行了結(jié)構(gòu)上表征測(cè)試,主要包括基質(zhì)及稀土元素種類構(gòu)成、物相結(jié)構(gòu)、微觀形貌等。另外,還對(duì)其光學(xué)性能進(jìn)行了一定程度上的表征,包括材料透光率、發(fā)射光譜及量子產(chǎn)率等。探究了熒光陶瓷成分構(gòu)成、微觀形貌對(duì)其光學(xué)性能產(chǎn)生的影響及影響機(jī)理。通過比較熒光粉粉末材料與熒光陶瓷材料的光學(xué)性能,可以得出,相同的成分構(gòu)成條件下,結(jié)構(gòu)上的致密化會(huì)大幅提高熒光材料的發(fā)光強(qiáng)度,而且一定程度上提高了材料的發(fā)光效率。
[Abstract]:Laser display as a new generation of display technology, its excellent display performance has aroused great concern in the field of scientific research and production. However, because of its low security, high cost and interference speckle noise, the laser display technology has not reached the standard of full application. The laser excitation fluorescence powder display technology mainly uses monochromatic laser to stimulate fluorescence. This technology not only solves the problem of laser dispersing spots, but also inherits the advantages of traditional semiconductor light source in life, reliability and safety, and reduces the cost of laser light source. Therefore, this technology is expected to be an improved technique for laser display and is eventually widely used. At present, the research on blue light excited fluorescence materials in the field of laser display is scarce. Therefore, high luminescence efficiency, good stability and short fluorescent life are obtained under the excitation of blue laser. High temperature resistant fluorescent materials will become the key to speed up the development and popularization of laser display. The main contents of this paper are as follows: 1. first of all, it is aimed at already The existing representative phosphor materials were characterized by a series of characterization. The structure and phase structure of the elements were analyzed by X ray photoelectron spectroscopy and X ray diffractometer. The microscopic morphology of the phosphor material was characterized by scanning electron microscope, including particle size, particle uniformity and so on. The optical properties of the phosphor materials were characterized by optical spectrometer and fluorometer, including the excitation and emission spectra, the quantum yield and the fluorescence lifetime. The.2. with excellent optical properties was used to obtain the compact fluorescent ceramics by the high temperature reaction to obtain better optical and mechanical properties. The preparation process of fluorescent ceramic materials excited by color laser is studied. In the process of sample billet synthesis, the influence of the type and mass fraction of the additive, the pressing mode and the size of pressure on the densification degree of the sintered ceramic materials are investigated, and the working mechanism of the influence is analyzed. In the process of burning, the influence of the maximum heat preservation temperature, the temperature and temperature rate and the heat preservation time on the densification of the sintered ceramic materials was investigated. The changes in the reaction process were analyzed from the microscopic particle angle, and the densification of the ceramic materials and even the optical properties of the ceramic materials were explained. According to the analysis of the experimental results, it is concluded that (1) in order to make the best densification of the fluorescent ceramic material, in the process of mixing raw materials, according to the different materials of the phosphor powder, the content of the additive has an optimum mass fraction. (2) the pressure size and the pressure holding time are all stored in the process of forming the blank body. At an optimal value, it is the best densification of the sample. (3) in the process of sintering, the effect of increasing the heat preservation temperature on the densification of the ceramics is greater than that of the heat preservation time. The prolongation of the heat preservation time may cause abnormal growth of the grain, but the fluorescence intensity and the luminous efficiency of.3. are reduced to the synthetic fluorescent ceramics. The material was characterized by structural characterization, including the composition of matrix and rare earth elements, phase structure and Micromorphology. In addition, the optical properties of the materials were also characterized, including the transmittance, emission spectra and quantum yields of the materials. The composition of the fluorescent ceramics was explored and the optical properties of the micromorphology were produced. By comparing the optical properties of phosphor powder materials and fluorescent ceramic materials, it can be concluded that under the same composition conditions, the densification of the structure will greatly increase the luminescence intensity of the fluorescent material and improve the efficiency of the material to a certain extent.

【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN104.3

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